Sewing machine



Feb. 5, 1935.

F. ASHWORTH SEWING MACHINE Filed May 27, 1932 2 Sheets-Sheet 1 WORTH EWING MACHINE Filed y 27, 1952 2 heets-Sheet 2 m s #5, M

Patented Feb; 5, 1935 I i v v UNITED PATENT OFFICE:

I v I 1,990,161 f SEWING MACHINE V v FredAsh'vvorth, Beverly, Mass, assignor to United v Shoe Machinery 'Corpora'tion, Paterson, N; J.,

a corporation of New Jersey t w Application May 27, 1932, Serial No. 613,822

Claims. (01. 112-45) The present invention relates to wax thread disengaging movement of the, presser-foot and shoe sewing machines, and more particularly to feed point at the end of the seam. a work channelling device for use in connection Further features of the invention consist of with a McKay type shoe sewing machine, which certain constructions, arrangements and combi 5 type of machine comprisesa straight hook needle nations of parts, the advantages of which will be 5 and a shoe supporting horn arranged to extend obvious to one skilled in the art from-the 'followwithin the shoe,'and a needle threading whir ing description. located in the horn. In the drawings illustrating the invention in The object of the present invention is to proits preferred form, Fig. 1 is a view in'front ele actuating a grooving or channelling knife for and work feeding devices, of a sewing machine machines of the type referred to, embodying the present invention; Fig. 2 is a cor- Withthe above and other objects in view, the p n i vi w on n enlarged Scale f a p present invention contemplates the provision, in a tiOIl 0f the meChaIliSm ShOWh i 8 a shoe sewing machine, of a work grooving or chan- View in side elevation on a slightly reduced scale, 15

nelling knife supported upon a carrier arranged and pa y in Section, of the devices illustrated n to be moved toward and away from the work, and d 4 is a View in section taken in the direction of work feed,which carrier sup along th line in 2. v i ports and actuates a work piercing instrument to T machine illustratd in the drawings knife during the return movement of the carrier supporting j h 4, having a needle d h after the feeding movement of the work piercing Whirl a P r- 6, a dp t 8, a rotary instrument. The channelling knife is preferablyu t e 10, d en s ad 12 f n a in 2 soice-nnected w the a ov w the loop of thread with the beak of the shuttle;

work, and a spring is provided, acting to cause and IEIEHJSE h 01 a st 6 y the knife to yieldingly engage the work. -The ho'frr w l the i point 8 a es d e ds knife is prevented from producing too deep a the W k alternately with the engagement of the channelbyastop member associated-with the oer- P es -id as is usual in this y of machine-1 rierto arrest the movement of the knife under the ThP s i tii is pp r at th d of ct on of th spring a reciprocating presser-foot bar 14.; The pressermachine to whicfithe present invention l n ly h -imi io d is applied is substantially the'sarne as that deis intermittently retracted a uniform distance scribed inapplicants copending application Serial 0m the Work by mechanism, indmated there is disclosed a machine of the McKay type is oscillated i $11it&b1e t dr'lation with' t e having a straight hook needle, a rotary work sup= other i Q ri devices- 'T f feed p' 8 porting 110m, a Presser-foot a feed point, t. is clamped at the lower end ofa carrier 20', slid tlefand various other necessary elements for d t d for vertical movement toward and forming stitches and feeding the work. This ma e yi n iiiework in a guide frame 2 which chine, as previously constructed, is arranged with ,p t mounted on h mam frame Q h a" carrier of the type indicated for operating the h t,

feed point. The movement of the carrier in this hgu f 2 3 1 5 about Its YPt to Q5 machine towardand from the work is controlled a ga igfigjgggig 223 2 m rt by the position ofthe press'er-foot while i e i Z i pa v i which is loosely mounted on ahub supported at: r

m engagementwith thework, SO that? u fO the forward end of a rock shaft 26. The rock penetratlon of the feed m a w take shaft is oscillated by connectionstoamain sewing placerand whenitvhe P ralsed at 1 shaft, as more clearly described in the co-pendend of the seam, the feed point W111 also be d1s+ mg ap l Teierred engaged from'the-work. According to another The f p i t is moved t a om" feature of the p inVentiQn, h Of a; gagement with the work by the sliding movement carrier operated in this manner in ures that the of the feed point carrier '20 in the frame 22,

, workgroovin'gknife will automatically be dis'en-' through connections to the presser footactuat 10 duce an improved mechanism for supporting and vation of a portion, including the stitch-forming 10 v feed the work, and impartsa cutting action to the prises a Straight 1100K eedle a rotary work 26 relation,theretoas'thecarrier moves toward the T Presser-foot is actuated intermittently No. 394,770, filed Septe'rriber 24, 1929, in hi ally at 16 actuated from a shaft 18 which, in ter 35 gaged from the work simultaneously wi'th the ing rock shaft 18'; These connections" comprise a link 28 pivotally connected at one end with the upper end of the feed point carrier 20 and at the other end with the arm of a bell crank 30 fulcrumed on a shaft 32 secured to an arm 34, a link 36 connected between the other arm of the bell crank 30 and an arm 38 connected with the presser-foot actuating shaft 18, the arrangement 1 being such that the feed point is moved into engagement with the work while the presser-foot releases the work. The arm 34 which carries the bell crank 30 is fixed at one end toa shaft 40 rotatable in the frame of the machine and at the other end is connected to move with the reciproeating presser-foot bar 14 so thatthe lowermost position of the feed point, while in engagement with the work, is determined by the position of the presser-foot, and as the presser-foot is raised from the work at the end of the seam, the feed point is also separated from engagement with the Work.

' At the ,end of a seam, or at other times, the presser-foot, together with the feed point carrier, and the feed point, may be retracted from the work automatically or by means of a hand lever 27. The lever is provided with an abutment 42 adapted to engage a pin 43 carried on the presserfoot bar 14. All of the parts above briefly referred to areconstructed and arranged in the same manner and operated by mechanismsimilar to that illustrated and described in said previously mentioned application.

In accordance with the present invention, a work grooving knife 44 is provided, pivotally mounted at its upper end on a short horizontal U-shaped link 45 pivoted in'turn at 46 to and surrounding the lower end of the feed pointcarrier 20. The lower end of the work grooving knife extends loosely through an opening'4'7 in the feed point 8 near its work engaging end. The knife is resiliently held in engagement. with the work by a compression spring 48 secured at its upp r end in an opening formed inthe feed point carrier and pressing at its lower end against the bottom of a similar opening in the link 45.

intermittently; disengaged, as in the ordinary stitching operation. When the feed point moves into engagement-with the work to cause the work to be fed, the spring 48 yields and allows the knife to remain stationary without injuring the work and during. the feeding movement of the 1 feed point, moves with the work without any cutting action.

under the action of the spring 48, deeper than To prevent the knife from forming a channel desired, an adjustable stop screw 49 is threaded into the feed pointcarrier and a lock nut arranged to prevent change of adjustment; The

. inner end of the stop screw 49 engages a portion 50 extending upwardly from the pivoted end of the link 45 in a position to prevent downward movement, beyond the position to which the stop' screw is adjusted, of the end of the link carrying the channel knife. The stop screw also serves at the end of the seam to cause the channelling knife rections from the movement of the feed point By this means,,the grooving knife is maintained in engagement with the work while the feed point toward and from the work. The stop screw 49 on the feed point carrier is adjusted to strike the portion 50 of the link 45 at exactly the point at which the feed point reaches the upper limit of its travel, according to the depth to which the channel is desired to becut. As the feed point engages the work, the grooving knife remains stationary until the, work feeding movement begins, during which time it moves with the work so that no cutting action of the knife takes place. The feed point is then disengaged from the work and moved in a direction opposite to that of work feed; to its original position. While the feed point is being disengaged from the work, the spring 48 acts to maintain the knife 44 stationary and in engagement with the work. While the feed point is being backfed, the knife moves with it against the work to form a continuous channel by reason of the engagement of the knife against the side of the opening 47 in the feed point. This occurs while the work is rigidly clamped between the resser-foot and the work supporting horn without interfering in any way with the operation of theother stitch-formingand work feeding devices. 1 At the end of the seam, the presser-foot, feed point, and channelling knife may simultaneously be retracted to disengage the work as indicated,

Having thus described the invention, what is claimed is: l n V 1. A sewing machine having, in combination, stitch-forming and work feeding devices including a work support, a presser-foot, a carrier arranged to be moved with relation to the presserfoot toward and away from the work and in the direction of work feed,;and a work piercing instrument and a work grooving knife mounted on the carrier to operate on the work during sewing of a seam,

2. A sewing machine having, in combination,

stitch-forming and work feeding devices inc1uding a work support, a presser-foot, a needle, a feed point carrier arranged to be moved in the direction of work feed, a feed pointsecured to the carrier, a work grooving knife mounted on thecarrier for movement toward and from the work relative thereto, and means for actuating the grooving knife to engage and cut the work during the back feeding'movement of the feed point carrier, andwhile the'presser-foot engages the work.

3.-A sewing machine having, in combination, stitch-forming and work feeding devices including a work suppo'rtinghorn and a presser-foot,

a straight hook needle, a feed point carrier ar-; ranged to be movedtowardand away from the work and in the directioniof work feed, a feed point-secured to the carriena work grooving away from the work and for movement with the.

feed point in the "direction of work feed, and resilient'me'ans arranged to cause the grooving knife toyieldingly. engage the'work while the feed point is moved away from thework.

4. A sewing machine having," in combination,

stitch-forming and work feeding devices including a work supporting hornand a, presser foot', a

straight hook needle, a feed point carrier arranged to be moved toward and away from'the work and in the direction of work feed, a feed point secured to the carrier, a work grooving knife mounted on the carrier for'movement relative to'the feed point in a direction toward and away from the work and formovement with the feed point in the direction of work feed, resilient means arranged to cause the grooving knife to yieldingly engage the work while the feed point is moved away from the work, and a stop, acting between the feed 1 point carrier and the grooving knife for limiting the movement of the knife by the resilient means toward the work while the feed point is moved away from the work. J

5. A sewing machine of the McKay type having, in combination, stitch-forming and work feeding devices including a rotary work supporting horn and a presser-foot, a straight hook needle, a feed point carrier arranged to be moved toward and away from the work and in the direction of work feed, a feed point secured to the carrier, a work grooving knife mounted on the carrier for movement relative to the'fecd point in a direction toward and away from the work, and for movement with the feed point in the direction of work feed, connections for actuating the stitch-forming and work feeding devices to cause the grooving knife to engage and cut the work during the back feeding movement of the feed point, and while the presser-foot engages the work, and means for raising simultaneously the presser-foot, the feed point and the grooving knife from the work at the end of the seam.

6. A sewing machine of the McKay type having, in combination, stitch-forming and work feeding devices including a rotary work supporting horn and a presser foot, 2. straight hook needle, a feed point carried arranged to be moved toward and away from the work in the direction of work feed, a feed point secured to the carrier, a work grooving knife mounted on the carrier for movement relative to the feed point in a direction toward and away from the work, and for movement with the feed point in the direction of work feed, connections between the presser-foot and the feed point for causing the feed point to penetrate the work uniformly according to the position of the presser-foot on the work, mechanism for raising the presser-foot from the work at the end of a seam, and means for actuating the stitchforming and work feeding devices to cause the grooving knife to engage and cut the work dur ing the back feeding movement of the feed point and while the presser foot engages the work.

'7. A sewing machine having, in combination, stitch-forming devices including a work support, a presser-foot, a carrier arranged-to be moved toward and away from the work and in the direction of work feed, a feed point on the carrier having an opening adjacent its work engaging end, and a work grooving knife secured to the machine and extending through the opening in the feed point to engage and cut the work during the ing the feed point to feed the work, and a work;

grooving knife secured to the machine and extending through the opening in the feed point to cut the work during the back feeding movement of the feed point.

9. A sewing machine of the McKay type, having, in combination, stitch forming and work feeding devices including a rotary work supporting horn and a presser-foot, a straight hook needle, a feed point movable'in the direction of work feed, means for actuating the feed point to feed the work, and a work grooving knife movable in the direction of work feed arranged to cut the work during the back feeding movement of the feed point.

10. A sewing machine of the McKay type having, in combination, stitch forming and work feeding devices including a rotary work support-- ing horn and a presser-foot, a straight hook needle, a feed point movable in the direction of work feed, a grooving knife mounted to move relatively to the feed point and actuated by the feed point during the back feeding movement of the feed point to cut the work.

FRED ASHWORTH.

CERTIFICATE OF CORRECTION.

Patent N0. 1,990,161. February 5, 19 35.

FRED ASHWORTH.

It is hereby certified that error appears in the printed speeifieation of the above numbered patent requiring correction as follows: Page 3, first column, line .31, claim 6, for "carried" read carrier; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the ease in the Patent Office.

Signed and sealed this 9th day of April, A. D. 1935.

Les! ie Frazer (Seal) Acting Commissioner of Patents. 

